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HST/STIS observations of the HeII Gunn-Peterson effect towards HE 2347-4342
Alain Smette, Sara R. Heap, Gerard M. Williger +3
We present an HST STIS spectrum of the HeII Gunn-Peterson effect towards HE2347-4342. Compared to the previous HST GHRS data obtained by Reimers et al. (1997), the STIS spectrum ha…
Damped Lyman-alpha absorption from a nearby Low Surface Brightness galaxy
D. V. Bowen, T. M. Tripp, E. B. Jenkins
Ground-based & HST images of the nearby galaxy SBS 1543+593 (z=0.009) show it to be a Low Surface Brightness (LSB) galaxy with a central surface brightness of mu_B(0)=23.2 mag/arcs…
Spatial Variability in the Ratio of Interstellar Atomic Deuterium to Hydrogen. II. Observations toward Gamma2 Velorum and Zeta Puppis by the Interstellar Medium Absorption Profile Spectrograph
George Sonneborn, Todd M. Tripp, Roger Ferlet +4
To measure interstellar atomic deuterium abundances, we used the Interstellar Medium Absorption Profile Spectrograph (IMAPS) to obtain spectra of gamma2 Vel and zeta Pup over the w…
FUSE Observations of the Galactic and Intergalactic Medium Towards H1821+643
W. R. Oegerle, T. M. Tripp, K. R. Sembach +8
We have obtained moderate resolution spectra of the bright QSO H1821+643 (z=0.297) in the wavelength interval 990-1185A with FUSE. Strong, complex OVI 1032 and FeII 1145 absorption…
Intervening O VI Quasar Absorption Systems at Low Redshift: A Significant Baryon Reservoir
T. M. Tripp, B. D. Savage, E. B. Jenkins
FUV echelle spectroscopy of the radio-quiet QSO H1821+643 (z = 0.297), obtained with the Space Telescope Imaging Spectrograph (STIS) at 7 km/s resolution, reveals 4 definite O VI a…
The Properties of Molecular Hydrogen toward the Orion Belt Stars from Observations by the Interstellar Medium Absorption Profile Spectrograph
Edward B. Jenkins, Przemyslaw R. Wozniak, Ulysses J. Sofia +2
Absorption features from the Lyman and Werner bands of interstellar molecular hydrogen were recorded by the Interstellar Medium Absorption Profile Spectrograph (IMAPS) at a wavelen…